Comparison of Municipal and Coke Wastewater Sludges in Disintegration and Acidogenesis by Microwave
Publication: Journal of Environmental Engineering
Volume 137, Issue 8
Abstract
This work experimentally determined the effect of microwave treatment on the disintegration and acidogenesis of waste-activated sludges (WAS) from municipal and coke wastewater treatment plants. Sludge samples (500 g) were heated for 0, 3, 5, 7, 9, 11, and 15 min in a microwave oven (2,450 MHz, 700 W). The degree of sludge solubilization [soluble chemical oxygen demand (SCOD)/COD] increased asymptotically with microwave irradiation time from 1.5% at 0 min to 22.3% at 15 min for WAS from a municipal wastewater treatment plant () and 1.5% to 5.1% for WAS from a coke wastewater treatment plant of a steel manufacturing industry (). The calcium concentrations in both sludges also increased with microwave irradiation time. The biochemical acidogenic potentials (BAP) increased from 3.70 to for and 1.19 to for . The results show that microwave irradiation increases the solubilization and BAP of sludges and that had a higher degree of solubilization and BAP than .
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Acknowledgments
This research was supported by the Korea Ministry of Knowledge and Economy (MKE) as a Manpower Development Program for Energy and Resources, and the Ministry of Environment (MOE) as Human resource development Project for Energy from Waste and Recycling.
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Published In
Journal of Environmental Engineering
Volume 137 • Issue 8 • August 2011
Pages: 740 - 745
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jul 12, 2010
Accepted: Mar 3, 2011
Published online: Mar 5, 2011
Published in print: Aug 1, 2011
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